Air-exhausting device for steam-heating systems.



N. S. ATKINS. AIR -EXHAUS'I'ING DEVICE FOR STEAM HEATING SYSTEMS.

APPLICATION milj AUGJS. |916.

IPatented Sept. 3, 1918.

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N. S. ATKINS.

AIR EXHAUSTING DEVICE FOR STEAM HEATING SYSTEMS.

APPLICATION FILED AUGJS. |9I6,

Patented Sept. 3, 1918.

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NEWTON S. ATKINS, OF CHARLESTON, VIRGINIA.

AIR-EXHAUSTING DEVICE FOR STEAM-'HEATING SYSTEMS.

f Specification of Letters Patent. y

Patented Sept. 3, 1918.

Application filed August 25, 1916. vSerial No. 116,904.

To all whom it may concern.'

Be it known that I, NEWTON S. Aquinas, acitizen of the United States, residing at Charleston, in the county of Kanawha and State of Test Virginia, have invented/certain new and useful Improvements 1n Air- Exhaustlng Devices for Steam-Heating Systems; and I do hereby declarethe following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and useV the same.

The primary object of this invention is to install in a steam heating vsystem an air f creates a suction through the return pipeof l the heating system and eifects'withdrawal of the air from the system.

Another object of the invention is the provision of a novel type of eXhauster having a float operated valve therein, the said valve having connection withthe damper in the-discharge flue, and the said exhauster being so positioned within the return pipe that when the steam within the boiler eX- ceeds a predetermined pressure the steam will force water from the boiler into the exhauster and elfect heating of the valve, thereby moving the damper to closed position and cutting off the draft through the discharge iiue. l

- Other objectsY will appear and be better understood from that embodiment ofiny invention of which the following is a specifi-` cation, reference being had tothe accompanying drawings lforming a part thereof, in which: f.

Figure 1 is a front view of a boiler of the steam heating system, showing the exhauster in operative position in the return pipe and having communication with the discharge fine of the boiler,

Fig. 2 is a top `plan view of the eXhauster,

Fig. 3 is a section, taken on the line 8-3 of Fig. 1,

Fig. 4 is a vertical sectional view, taken through the eXhauster,

'Fig 5 is a sectional detail view of the float operated valve, and showing the same in closed position,

Fig. 6 is adetail sectional view of the valve, showing the samein open position.

Referring toV the drawings in detail, the letter A designates a boiler ofthe steam heating system, having the usual discharge flue B, which communicates with a chimney C. The steam dome of the boiler is to be connected up, as usual, with the distributing system, not shown. The return pipe of the system is formedof sections 1 and 2, the

section 1 extending horizontally and beingv connected up in the usual manner with the heating system, andthe section 2 is extended vertically and has its lower end communicated by a horizontalbranch with the water space in the boiler A. i

An airexhauster, designated by the numeral 3, is formed of a-vertically disposed cylindrical body having its lower end provided with a nipple 4 that receives the upper end of the section 2 of the return pipe, so as to communicate the water space of the f boiler A with the interior of the exhauster i 3. The eXhauster 3 has one side provided with a nipple 5, which is located adjacent the upper end of the exhauster and receives the adjacent end of the section 1 of the return pipe, as is shownv more clearly in Fig.

4 of the drawings. The-upper end ofthe exhauster is closed by means of a ianged cap, through which extends a cylindrical shaped valve casing 6, the upper end of the valve casingl projectingv a slightdistance above the cap and threadedly received by one end of the head of a T coupling 7 the stem of the T couplingv 7 threadedly receiving one end of a horizontally ydisposed pipe 8, the opposite end of the pipe 8 extending into the discharge flue B of the boiler. When a draft is created through the dischargev flue B, the same will create suction in the exhauster 3 by virtue of communication being had between the eXhauster andk the discharge flue by means of the pipe 8. A vertically reciprocating rod 9 is extended through the casing 6, and has its upper end extended through the upper end of the head of the T coupling 7 and terminally provided with a ring 10 that has connection `with a chain 11 that is connected with a suitable operating mechanism, not shown, for the rra saaENv @WWE damper (not shown) of the discharge flue. The lower end of the rod 9 extends into a cylindrical valve 12, the saidlower end of the stem having connection with a spider 13 mounted within the cylindrical valve and disposed a distance below the upper end of the valve. The upper end of the valve 12 is permanently located within the casing 6, and .the said valve is provided with a verticalseries of ports 14. The lower end of the valve^12 is closed by means of a head, from the lower surface of which depends a bifurcated member 15. Disposed below the valve 12 is a float 16, the upper endof which is connected to the lowerl end of a vertically disposed stem 17, the upperend of the stem 17 extendingbetween the fingers of the bifurcated body 15 and pivoted therebetween by means of a pivot pin 18.

Then the float l16 is in the lowered position, as shown in Fig. 4, the valve 12 will be lowered, so as to locate the openings 14 below the `lower end of the casing G. This lowering of the valve 12 will, by virtue of the rod 9 and the chain 11, operate the damper operating mechanism and open the damper. Zhen the damper isy opened the draft created by the chimney C through the discharge flue B will create a suction through the pipe 8 and casing 6, and through the openings 14 in the valve 12, thereby creating a suction within the exhauster` 3. The suction created within the exhauster 3 will result in asuction being' created through the section 1 of the return pipe, thereby exhausting air from the heating system into the exhauster y3 and through the openings 14 in the valve 12 into the casing 6, and thencel out through the pipe 8 and discharged into the flue B. This extraction of the air from the heating system also causes any condensation within the system to be drawn into the exhauster 3 and thence pass from the exhauster through the section 2 of the return pipe to the water space in the boiler A.

If `the steam in the steam dome of the boiler A increases beyonda predetermined pressure the same will force water from the boiler A upwardly through the flue of the return pipe into the exhauster 3, and hence ymove the float 16 upwardly and cause-the valve 12 to be moved into the casing G so as4 to cut elfi communication between the interior of the casing 6 and the exhauster 3. This upward movement of the valve 12 also causes the rod 9 to be moved upwardly and effect operation of the damper operating mechanism, so as to move the damper to closed position and cut off the draft through the'disc-harge Hue B. lVhen the steam pressure again reaches normal the water in the exhauster 3 will return to the boiler 'and admitk ofthe float l16 being lowered, so as to open the damper, not shown, and the valve 12 and admit of the exhausting operation, above described, being repeated.

By virtue of the vertical series of openings 14 al gradual reduction of the suction in the exhauster 3 will be effected during the raising of the valve 12 by the float 16 when water is forced from the boiler into the exhauster.

The lower end of the casing G is provided with a beveled seat 19 and the head on the lower end of the valve 12 has a peripheral beveled flange 20, which is adapted to en-` gage vthe seat 19, when the valvev is moved to itsI uppermost position, so as to effect a tight joint between the lower end of the valve .and the casing, when the valve is in closing position.

A suitable gage glass 21 is associated with the exhauster and serves to admit of the amountv of water within the exhauster being determined, the said gage glass having its lower end provided with a discharge cock 22, whereby to admit of thel discharge of the water that has been forced into the exhauster, when desired.

,It is evident ythat various changes might be resorted to in the construction, form and arrangement of Athe several parts without departing from the spirit and scope of my invention: Hence, I do not wish to limit myself strictly to the structure herein described and claimed.

Having thus described the invention what is claimed as new, is:

In a steam heating system,`the combination with a steam boiler and a draft flue for the boiler and a radiator return pipe, of an exhauster casingarranged in communication with the return pipe and boiler,a vertical valve casing extending through the upper end of the exhauster casing, a pipe establishing communication between the draft fluerof the boiler and the upper end of the exhauster casing and having the upper end In testimony whereof I affix my signatureY in presence of two witnesses.

n NEIVTON'S. ATKINS.

Witnesses:

S. P. RICHMOND, ELTA M. CHASE.

Gomes of this patent maybe ehtned for ve cents each, by addressing the Commissioner f Patents, Washington, D. C. 

